Abstract:For large-yield warheads, the thermal effect of explosion is one of the most important damage parameters. Thermocouples are the most widely used and cost-effective temperature sensors. Ensuring the temperature measurement stability of thermocouples and the test accuracy of transient temperature is a technical problem that urgently needs to be overcome and solved in the field of explosion field experiments and tests. To solve this problem, tungsten-rhenium thermocouples with a diameter of 100 μm were laser welded and statically calibrated using the radiation method. The thermocouples were dynamically calibrated using a pulsed laser that could give the thermocouples transient forced temperature excitation. Numerical simulation and experimental verification showed that the thermocouples made using fiber lasers could meet the needs of the explosion field. The sensor repeatability was 98.96%, the temperature test accuracy error was less than 0.38%, the sensor response time was less than 6 ms, and the response time test accuracy was better than 1%. The fireball thermal radiation signal could be detected, and the temperature curve transfer law of 1169 ℃ after the shock wave adiabatic compression of the air was consistent with the temperature curve law obtained by numerical simulation.